Rubber package fabrication



June 6, 1939.

L. L. SALFISBERG RUBBER PACKAGE FABRICAT ION Filed Nov. 21, 1936 INVENTOR.

Patented June 6, 191 59 v I v UNITED STATES MPATENTQ OFFICE Leroy L. Salfisberg, South Orange, N. J., assignor' ,t o Ivers-Lee Company, Newar N. J.,' a cor poration of Delaware Application November 21, 1936, Serial No. 112,112 1 Claim. (Cl. 206-56) This invention pertains in general to container in accordance with a known process to produce and package fabrications and specifically relates a transparent elastic stock suitable for the use to such structures formed of rubber and the like. described. The article I, as .shown in the draw- One object of the invention is to provide a ing, is of rectangular configuration with square commodity package embodying novel and imcorners, although other shapes of articles can'be proved features of construction'whereby the comequally well packaged in accordance with the modity shall be sealedwithin a moisture and air invention. resistant material andthe package can be easily The walls 3 and 2 are drawn over the article I and quickly opened for removal of the commodity. and meet in an encircling flange 4 disposed in a Another object is to'provide in such a package central plane of the article I. It will be seen that 10 a novel and improved construction and combinathe walls 2 and 3 are stretched at points 5 and 6 tion'of elastic transparent walls joined in an inwhere the walls are drawn over the edges of the tegral flange whereby the walls can be maintained article I However, this stretching is accommounder uniform tension around the commodity, dated without rupture due to the elasticity of the and stresses in the walls shall be uniformly discomposition of the walls 2 and 3. The flange 4 15 tributed, completely encircles the article I and, in accord- A further object is to provide a package of this ance with the invention, is of a thickness subcharacter wherein said walls and flange shall be stantially twice that of the walls 2 and 3. The constructed and related so that the flange shall flange 4 is therefore relatively stiff so as to reserve as a tearing tab to facilitate tearing of the enforce the package, distribute stresses in the 20 walls of the package along the juncture of said walls 2 and 3 to maintain the ,walls under uniformwalls and flange for opening the package. tension and restrain warping or twisting of the Theseand other objects will be apparent from package. The flange also provides a tearing tab the following, reference being had to the accomto facilitate. tearing of the walls 2 and 3 along panying drawing in which like reference numerthe juncture of the flange with the walls to 25 als designate corresponding parts and in Which: enable the package to be easily and quickly Fig. 1 is a plan view of a preferred embodiment opened. of a package structure in accordance with the The thickness d of either wall 2 and 3 is oneinvention; and r half the thickness of the flange 4. It will be seen Fig. 2 is a sectional view taken along the line that both the horizontal and vertical walls sur- 30 2-2 of Fig. 1'. rounding the article are closely adjacent to the The invention contemplates providing an arsurface of the article, and that there is very little rangement for packaging small articles ina uniwaste space. This is made possible in this form tary structure mountedin a single piece of chemof package structure by the configuration and ically resistant moisture-impervious material. composition of the material. 35

' This material is of a resilient non-fibrous com- Referring to Fig. 1, the flange 4 is provided with position which is adapted to produce a container opposed notches 1 and 8 on the outside edges structure closely fitting an enclosed article withthereof aligned with the inner surface of the verout producing strain or rupture in the packaging c tical wall 9 of the casing structure extending be- 40 material. For example, articles with short or tween the horizontal walls 2 and 3. These 40 square corners can be packaged in accordance notches divide the encircling flange so that the with the invention with packaging material right hand section 411 thereof, in effect, becomes stretched tightly over such corners without rup-' a tab for tearing across the mouth of the conturing the packaging material or destroying its tainer structure so that the' contained article may moisture-proof qualities. be removed.

According: to the invention, the commodity The formation of the package structure, molded 'article is enclosed in a molded one-piece con-' around the commodity article in the form shown, tainer embracing a flange structure adapted to is disclosed in the process described in my United encase the article with a minimum amount of the States Patent No. 2,141,318 granted December 27, liopackaging structure material while yet insuring 1938. In accordance with this process, the transfacile opening characteristics. Referring to the parent latex is simultaneously stretched and drawing in detail, a commodity article I is enmolded around the article to produce a close-fitclosed between two walls 2 and 3 of a unitary conting unitary structure in the form shown. After tainer composed of transparent rubber. The rubbeing molded, the package is allowed to cure for ber is of the treated type, having been prepared a predetermined time to insure the proper pack- 6! aging characteristics. Although a preferred form of rubber package fabrication has been disclosed, it will be recognized that various modifications and equivalent forms cantbe produced without departing from the intended scope of the invention. Therefore, no limitation is intended other than as is imposed by the. appended claim.

What is claimed as new and original to be secured by Letters Patent of the United States is:

A package for a substantially rigid article, comprising a casing having thin walls of elastic rubber composition stretched around all sides of said article and being closely adjacent all surfaces of the article, and an integrally Joined molded flange surrounding the article in approximately a central plane thereof and being of substantial width and of a thickness substantially greater than the thickness of said walls, said flange being relatively stifi so as to reenforce the package, distribute stresses in said walls to maintain the walls under uniform tension and restrain warping or twisting of the walls and provide a tearing tab to facilitate tearing of said walls along the juncture of said 10 flange withthe walls to open the package.

LEROY L. SALFISBERG. 

